Louisiana wildlife officials say huge tar balls have littered the beach at Port Fourchon, some of them 8 inches across. The tar balls originated with the oil spill from the Deepwater Horizon rig disaster on April 20. The glossy globs were found along the entire beach at Port Fourchon, due south of New Orleans on the Gulf of Mexico. Biologists found about 25 nickel-sized tar balls per square foot from the beach's southwestern end to its midpoint.